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2 years ago

During which process of the water cycle does water change from a gas to a liquid? A.precipitation

Chemistry

2 answers:

Helga [31]2 years ago

6 0

Answer: Option (B) is the correct answer.

Explanation:

Condensation is defined as a process in which vapor state of a substance changes into liquid state.

Precipitation is defined as a reaction in which two aqueous solutions on chemically combining with each other leads to the formation of an insoluble solid substance.

Evaporation is defined as a process in which liquid state of a substance changes into vapor state.

Transpiration is defined as a process in which plants absorb water with the help of their roots and then release water vapor through the pore present in their leaves.

Therefore, we can conclude that during condensation process of the water cycle, water change from a gas to a liquid.

madreJ [45]2 years ago

3 0

The correct answer is B.Condensation. The other person who answered this question is wrong, it is NOT A. precipitation.

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3 years ago

Pure chlorobenzene (C6H5Cl) has a normal boiling point of 131.00 °C. A solution of 32.5 g of 2,8-dibromodibenzofuran (C12H6Br2O)

vichka [17]

Answer:

Kb → 1.56 °C / m

Explanation:

This is all about boiling point elevation, the colligative property that shows that boiling point for a solution is higher than boiling point of pure solvent.

This is the formula: ΔT = Kb . m . i

where i is the Van't Hoff factor (ions dissolved in solution). As these are organic compounds, we assume they are non electrolytic,

m is molality (mol of solute / 1kg of solvent)

Kb is our unknown. The value for ebulloscopic constant, it is specific for each solvent.

ΔT = T° boiling from solution - T° boiling from solute

First of all, let's determine the moles of solute.

Mass / Molar mass → 32.5 g/ 113.45 g/mol = 0.286 mol

Molality is mol of solute/ 1 kg of solvent

We must convert the mass from g to kg

195g . 1kg /1000 = 0.195 kg

Molality = 0.286 mol / 0.195 kg = 1.47 m

Let's replace the values in the formula

133.30 °C - 131°C = Kb . 1.47m .1

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3 0

3 years ago

What is the name of John Daltons theory

Rashid [163]

Answer:

It is called the atomic theory I believe.

Explanation:

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2 years ago

Which chemical class does phenobarbital belong to?

drek231 [11]

<span>Phenobarbital is derivative of Barbituric Acid and Barbituric Acid is derivative of Urea. (structures shown in Fig below)

Urea has H</span>₂N- group attached to Carbonyl Group (C=O), and such class of comounds conataining H₂N-C=O bond are called as Amides.

Result:
So, <span>Phenobarbital belongs to Amides.</span>

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2 years ago